KR950006483B1 - 종형 mos트랜지스터와 그 제조방법 - Google Patents
종형 mos트랜지스터와 그 제조방법 Download PDFInfo
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- KR950006483B1 KR950006483B1 KR1019910009635A KR910009635A KR950006483B1 KR 950006483 B1 KR950006483 B1 KR 950006483B1 KR 1019910009635 A KR1019910009635 A KR 1019910009635A KR 910009635 A KR910009635 A KR 910009635A KR 950006483 B1 KR950006483 B1 KR 950006483B1
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- insulating film
- trench
- gate electrode
- impurity region
- forming
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D10/00—Bipolar junction transistors [BJT]
- H10D10/40—Vertical BJTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/025—Manufacture or treatment of FETs having insulated gates [IGFET] of vertical IGFETs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/611—Insulated-gate field-effect transistors [IGFET] having multiple independently-addressable gate electrodes influencing the same channel
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
- H10D30/66—Vertical DMOS [VDMOS] FETs
- H10D30/668—Vertical DMOS [VDMOS] FETs having trench gate electrodes, e.g. UMOS transistors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/111—Field plates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/111—Field plates
- H10D64/117—Recessed field plates, e.g. trench field plates or buried field plates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/514—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the insulating layers
- H10D64/516—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the insulating layers the thicknesses being non-uniform
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/517—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the conducting layers
- H10D64/518—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the conducting layers characterised by their lengths or sectional shapes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D84/00—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers
- H10D84/01—Manufacture or treatment
- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
- H10D84/016—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs the components including vertical IGFETs
Landscapes
- Insulated Gate Type Field-Effect Transistor (AREA)
- Non-Volatile Memory (AREA)
Abstract
Description
Claims (5)
- 반도체 기판(1)과, 상기 반도체 기판의 표면 상에 형성된 제1불순물 영역(7), 상기 제1불순물 영역 영역 아래에 형성되어 있으며, 상기 제1불순물 영역과 도전형이 반대인 제2불순물 영역(5), 상기 제1 및 제2불순물 영역을 관통해서 적어도 상기 제2불순물 영역의 저부보다 더 깊게 절곡되도록 상기 반도체 기판 표면 상에 형성된 트렌치(23), 상기 트렌치의 벽과 제1게이트 전극 사이에 제1게이트 절연막(9)을 끼워 형성된, 상기 트렌치의 저부에 배치된 제1게이트 전극(11), 및 상기 트렌치의 벽과 제2게이트 전극 사이에 제2게이트 절연막(15)를 끼워 형성된, 상기 트렌치의 상기 제1게이트 전극 상부에 배치된 제2게이트 전극(17)을 구비하고, 상기 제1게이트 절연막이 상기 제2게이트 절연막보다 두껍게 형성된 것을 특징으로 하는 종형 MOS트랜지스터.
- 반도체 기판(1), 상기 반도체 기판의 표면 상에 형성된 제1불순물 영역(7), 상기제1불순물 영역 아래에 형성되어 있으며, 상기 제1불순물 영역과 도전형이 반대인 제2불순물 영역(5), 상기 제1 및 제2불순물 영역을 관통하여 적어도 상기 제2불순물 영역의 저부보다 더 깊게 절곡되도록 상기 반도체 기판 표면상에 형성된 트렌치(23), 상기 트렌치의 벽과 플로팅 게이트 전극 사이에 제1게이트 절연막(9)를 끼워 형성된, 상기 트렌치의 저부에 배치된 플로팅 게이트 전극(11), 및 상기 플로팅 게이트 전극과 주 게이트 전극 사이에 캐패시턴스 절연막(13)을 끼워 형성하고, 상기 주 게이트 전극과 상기 제1 및 제2불순물 영역 사이에 제2게이트 절연막(15)을 끼워 형성된, 상기 플로팅 게이트 전극 상부에 배치된 주 게이트 전극(17)을 구비하고, 상기 제1게이트 절연막은 상기 제2게이트 절연막보다 두껍게 형성된 것을 특징으로 하는 종형 MOS트랜지스터.
- 제2항에 있어서, 상기 플로팅 게이트 전극 및 주 게이트 전극은 폴리실리콘으로 형성되는 것을 특징으로 하는 종형 MOS트랜지스터.
- 반도체 기판(1) 표면 상의 제1불순물 영역(7)과 상기 제1불순물 영역 아래에 상기 제1불순물 영역과 도전형이 반대인 제2불순물 영역(5)를 형성하는 공정, 상기 반도체 기판 표면 상에 상기 제1 및 제2불순물 영역을 관통하여 적어도 제2불순물 영역의 저부보다 더 깊게 절곡되도록 트렌치(23)을 형성하는 공정, 상기 트렌치 내에 제1절연막을 형성하고, 상기 제1절연막 상의 트렌치에 도전 물질을 채우며, 제1절연막 부분을 제거하여 트렌치의 저부에 제1게이트 절연막(9)가 남도록 하고, 상기 제1게이트 절연막의 상부 단부가 상기 제2불순 영역의 저부보다 낮은 곳에 위치되게 하는 공정, 및 상기 트렌치 내의 제1게이트 전극 및 상기 트렌치의 상부 측벽 전체에 상기 제1게이트 절연막보다 얇은 제2절연막을 형성하고, 상기 제2절연막 상에 도전물질을 채워 상기 제1게이트 절연막보다 얇은 제2게이트 절연막(15) 및 제2게이트 전극을 형성하는 공정을 포함하는 것을 특징으로 하는 종형 MOS트랜지스터 제조방법.
- 소스, 드레인 및 채널을 갖고 종형 MOS트렌지스터 생성 방법에 있어서, 상기 기판 표면으로부터 순서대로 종형으로 배열되어 있는 제1도전형의 제1반도체 영역, 제2반도체 영역 및 상기 제1도전형의 제3반도체 영역을 포함하는 반도체 기판(1) 내에 상기 제1 및 제2반도체 영역을 통해 상기 제3반도체 영역으로 연장되는 트렌치(23)을 형성하는 공정, 상기 트렌치의 내측면에 절연막을 형성하는 공정, 상기 트렌치내의 상기 절연막에 도전체를 형성하는 공정, 상기 제1 및 제2반도체 영역을 관통해서 상기 제3반도체 영역 내로 연장하는 홈을 형성하는데 있어서, 상기 홈의 단부는 상기 도전체의 저부 단부 위에 놓이도록 상기 절연막을 부분 제거하는 공정, 상기 MOS트랜지스터의 게이트 전극으로서 작용하는 도전막을 게이트 절연막을 통해 상기 내부 표면 상의 상기 홈에 형성하는 공정을 포함하는데, 상기 제1 및 제3반도체 영역은 상기 MOS트랜지스터의 소스 또는 드레인을 형성하고, 상기 제2반도체 영역은 상기 게이트 전극에 인가된 신호에 따라 상기 MOS트랜지스터의 소스 및 드레인을 전기적으로 접속 또는 분리시키는 상기 MOS트랜지스터의 채널을 형성하는 것을 특징으로 하는 종형 MOS트랜지스터 제조 방법.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP15265290 | 1990-06-13 | ||
JP02-152652 | 1990-06-13 |
Publications (2)
Publication Number | Publication Date |
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KR920001753A KR920001753A (ko) | 1992-01-30 |
KR950006483B1 true KR950006483B1 (ko) | 1995-06-15 |
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KR1019910009635A Expired - Fee Related KR950006483B1 (ko) | 1990-06-13 | 1991-06-12 | 종형 mos트랜지스터와 그 제조방법 |
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US (1) | US5126807A (ko) |
KR (1) | KR950006483B1 (ko) |
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US4914058A (en) * | 1987-12-29 | 1990-04-03 | Siliconix Incorporated | Grooved DMOS process with varying gate dielectric thickness |
JP2647884B2 (ja) * | 1988-01-27 | 1997-08-27 | 株式会社日立製作所 | 半導体装置の製造方法 |
US5034787A (en) * | 1990-06-28 | 1991-07-23 | International Business Machines Corporation | Structure and fabrication method for a double trench memory cell device |
-
1991
- 1991-06-12 US US07/713,505 patent/US5126807A/en not_active Expired - Lifetime
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